Chemistry Extended Essay Exemplar: Peanut Oil Extraction Conditions… | RevisionDojo

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IB Chemistry SL Extended Essay Example

How do different peanut oil extraction conditions (drying, roasting, hydration) affect the free fatty acid content and rust-removal efficiency of biodiesel made from the peanut oil, determined by the change in mass (±0.0001 g) of rusted iron nail?SL

Official IB Result

IB Grade: B

Criteria A: Focus and Method

5/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Good

A.3Research methodology

Excellent

Criteria Feedback

You communicated the investigation’s purpose clearly and kept the report focused on a coherent chemical investigation.
Your research question is clearly stated and the independent variable is operationalized in a way that makes the comparison easy to follow.
Your method is complete and generally appropriate, with relevant measurements, trials, and uncertainty information that support replicability.

The research question could be more tightly focused by giving one main dependent variable a clearer priority.
A few explanations are slightly repetitive, which weakens the sharpness of the overall line of argument.
Some method details could be more specific, especially around controlling conditions and confirming product quality.

Criteria B: Knowledge and Understanding

4/6

Criteria Strands

B.1Application of source material

Good

B.2Subject knowledge

Good

B.3Use of terminology and concepts

Excellent

Criteria Feedback

You show clear understanding of the chemistry behind biodiesel production, fatty acid content, and rusting.
You use subject-specific terminology accurately and consistently, which makes the science easy to follow.
You apply source material in a generally relevant way to support your background and explanation.

Some scientific explanations are more descriptive than deeply developed, especially where the cleaning mechanism is concerned.
A few source-based claims would be stronger if they were more closely tied to this exact system rather than used in a general way.
Some cause-and-effect statements would benefit from more precise chemical justification.

Criteria C: Critical Thinking

8/12

Criteria Strands

C.1Research quality

Good

C.2Analysis depth

Good

C.3Discussion and evaluation

Moderate

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria D: Presentation

2/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

Excellent

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Loading scores...

Official IB Result

IB Grade: B

Criteria A: Focus and Method

5/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Good

A.3Research methodology

Excellent

Criteria Feedback

You communicated the investigation’s purpose clearly and kept the report focused on a coherent chemical investigation.
Your research question is clearly stated and the independent variable is operationalized in a way that makes the comparison easy to follow.
Your method is complete and generally appropriate, with relevant measurements, trials, and uncertainty information that support replicability.

The research question could be more tightly focused by giving one main dependent variable a clearer priority.
A few explanations are slightly repetitive, which weakens the sharpness of the overall line of argument.
Some method details could be more specific, especially around controlling conditions and confirming product quality.

Criteria B: Knowledge and Understanding

4/6

Criteria Strands

B.1Application of source material

Good

B.2Subject knowledge

Good

B.3Use of terminology and concepts

Excellent

Criteria Feedback

You show clear understanding of the chemistry behind biodiesel production, fatty acid content, and rusting.
You use subject-specific terminology accurately and consistently, which makes the science easy to follow.
You apply source material in a generally relevant way to support your background and explanation.

Some scientific explanations are more descriptive than deeply developed, especially where the cleaning mechanism is concerned.
A few source-based claims would be stronger if they were more closely tied to this exact system rather than used in a general way.
Some cause-and-effect statements would benefit from more precise chemical justification.

Criteria C: Critical Thinking

8/12

Criteria Strands

C.1Research quality

Good

C.2Analysis depth

Good

C.3Discussion and evaluation

Moderate

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria D: Presentation

2/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

Excellent

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.